Agenda/Minutes

Zoom Meeting

CRY+VIS Interface Meeting

Date: 2022/6/3 13:00-13:40

Participants: Takahashi, Miyoki, Ikeda, Akutsu, Uchiyama, Hirata, Sato, Node, Ushiba, Yokozawa, Aso

Post O3 Upgrade portal

Schedule

IX: MN Oplev Laser noise (Preparing for temperature control). Offload.
EX: Recovery from cooling (Setpoint change, Offload, Health check).
IY: Leak test. Offload.
EY: Leak test.
Type-B: Recovery from FC on BS (OSEM adjustment, Cable touching, 50mHz yaw motion). Visual inspection of BS is necessary. Stand-alone SM driver for SR3. Geophone #2 in SR2.
Type-Bp: Test of traverser limit SW in PRM. Installation of MSB to BS. Health check of PRs. FC on PR3 and traverser limit SW to PR3 in the late next week.
Type-C: Alignment of OMC in the next week (Start from Y-arm alignment).

Status

Replacement of flip cables: EXT and BF temp.
TM height setting: Following the cooling.
Oplev: TM Oplev windshield in EX.
ACC:
Commissioning in air:
Commissioning in vacuum: Y-arm lock with Stefan and transmission of X-arm in the next week.
Acceptance check:
PF actuator: At the in-vacuum commissioning.
New vacuum pumps for V-chambers: Tested in IYA. Test in IYV in the next week.
Heater control: Pending.
TMS: QPD in EX.

Discussion

VIS Meeting

Date: 2022/6/3 14:00-14:25

Participants: Takahashi, Uchiyama, Fabian, Aso, Tanaka, Ushiba, Washimi

Summary Report

Type-A

Offloaded the GAS filters in IX, EX, and IY.

Type-B

Beam Splitter: after First Contact work last week, the H2 OSEM readout was close to the end of its usable range.
- We found a cable from one of the RM coils touching the security structure. We moved it and clamped it in a slightly different position.
- Then we adjusted the pitch and yaw of the BS using the picomotor and F0 yaw stepper motor respectively.
- We also inspected that nothing around the BF was touching the security structure. Ushiba-san also made a quick test moving up and down the F0 and checking the output of F1 and BF LVDTs.
- Finally, we moved H2 and H3 OSEMs to more suitable positions.
- We measured TFs and corroborated that the system is healthy.
In SR2, the geophones stopped working, so we checked. The problem was tracked down to the geophone #2 pins powering the preamplfier. There is a short circuit between pins 4 and 5. Next week we will check the in-vacuum cables and, depending on the result, we may want to change the preamplfier or the whole geophone with its pod.

Type-Bp

Health check of PR suspensions.

Type-C

Electronics

Control

Schedule

See Schedule

Type-A: Y-arm lock.
Type-B: Geophone in SR2.
Type-Bp: FC on PR3. Traverser limit SW in PR3.
Type-C: Alignmenet of OMC.

Safety

Discussion

Travel Plans

(Date in Kamioka)

The week from 6/6

Takahashi: 6/7-10
Sato: 6/6-10
Hirata: 6/6-10
Aso: 6/6-9

The week from 6/13

Takahashi:
Sato:
Hirata:

Next meeting

2022/6/10(FRI)

KAGRA/Subgroups/VIS/VISMinutes20220603 (last edited 2022-06-03 14:24:05 by RyutaroTakahashi)

-  ⇤ ← Revision 3 as of 2022-06-02 16:16:46 → 
  Size: 1936
  Editor: RyutaroTakahashi
  Comment:
+   ← Revision 14 as of 2022-06-03 14:24:05 → ⇥
  Size: 3400
  Editor: RyutaroTakahashi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 8:
-Date: 2022/6/3 13:00-
+Date: 2022/6/3 13:00-13:40
 Line 10:
-Participants:
+Participants: Takahashi, Miyoki, Ikeda, Akutsu, Uchiyama, Hirata, Sato, Node, Ushiba, Yokozawa, Aso
 Line 15:
- * IX: MN Oplev Laser noise (Thermometer). Offload.
+ * IX: MN Oplev Laser noise (Preparing for temperature control). Offload.
 Line 19:
- * Type-B: Recovery from FC on BS (OSEM adjustment, Cable touching, 50mHz yaw motion). Stand-alone SM driver for SR3.
 * Type-Bp: Test of traverser limit SW in PRM. Installation of MSB to BS. Health check of PRs. FC on PR3 and traverser limit SW to PR3 in the next week.
 * Type-C: Alignment of OMC in the next week.
+ * Type-B: Recovery from FC on BS (OSEM adjustment, Cable touching, 50mHz yaw motion). Visual inspection of BS is necessary. Stand-alone SM driver for SR3. Geophone #2 in SR2.
 * Type-Bp: Test of traverser limit SW in PRM. Installation of MSB to BS. Health check of PRs. FC on PR3 and traverser limit SW to PR3 in the late next week.
 * Type-C: Alignment of OMC in the next week (Start from Y-arm alignment).
 Line 29:
- * Commissioning in vacuum: Y-arm lock with Stefan in the next week.
+ * Commissioning in vacuum: Y-arm lock with Stefan and transmission of X-arm in the next week.
 Line 32:
- * New vacuum pumps for V-chambers: Test in IYV.
+ * New vacuum pumps for V-chambers: Tested in IYA. Test in IYV in the next week.
 Line 39:
-Date: 2022/6/3 14:00-
+Date: 2022/6/3 14:00-14:25
 Line 41:
-Participants:
+Participants: Takahashi, Uchiyama, Fabian, Aso, Tanaka, Ushiba, Washimi
 Line 45:
+ * Offloaded the GAS filters in IX, EX, and IY.
-Line 46:
+Line 48:
+ * Beam Splitter: after First Contact work last week, the H2 OSEM readout was close to the end of its usable range.
  * We found a cable from one of the RM coils touching the security structure. We moved it and clamped it in a slightly different position. 
  * Then we adjusted the pitch and yaw of the BS using the picomotor and F0 yaw stepper motor respectively.
  * We also inspected that nothing around the BF was touching the security structure. Ushiba-san also made a quick test moving up and down the F0 and checking the output of F1 and BF LVDTs.
  * Finally, we moved H2 and H3 OSEMs to more suitable positions.
  * We measured TFs and corroborated that the system is healthy.

 * In SR2, the geophones stopped working, so we checked. The problem was tracked down to the geophone #2 pins powering the preamplfier. There is a short circuit between pins 4 and 5. Next week we will check the in-vacuum cables and,  depending on the result, we may want to change the preamplfier or the whole geophone with its pod.
-Line 47:
+Line 60:
+ * Health check of PR suspensions.
-Line 54:
+Line 69:
- * Type-B:
+ * Type-B: Geophone in SR2.